In this paper, we report on the hard X-ray observation of the X-ray pulsar 1E 1145.1-6141 performed with the Nuclear Spectroscopic Telescope Array mission (NuSTAR). The coherent pulsation of the source with a period of ∼296.653±0.021s is detected. The source may be in the equilibrium phase, according to the most recent measurements of its pulse period. The pulse profile reveals a mild energy dependence and generally hints at a pencil-beam pattern. The pulse profile have evolved with time. The Pulse fraction is found to depend on energy with a fall in the value at ∼32keV. The NuSTAR spectra can be approximated by a composite model with two continuum components, a blackbody emission, cut-off powerlaw, and a discrete component in the form of gaussian to account for the emission line of iron. The estimated absorbed flux of the source is ∼6×10−10ergcm−2s−1 which corresponds to a luminosity of ∼5×1036ergs−1. Pulse phase-resolved spectroscopy were performed to understand the evolution of spectral parameters with pulse phase. The estimated blackbody radius is found to be consistent with the size of the theoretical prediction.
@article{arxiv.2210.05163,
title = {NuSTAR observation of X-ray pulsar 1E 1145.1-6141},
author = {Manoj Ghising and Mohammed Tobrej and Binay Rai and Ruchi Tamang and Bikash Chandra Paul},
journal= {arXiv preprint arXiv:2210.05163},
year = {2022}
}